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A bag contains 5 red balls and some b...

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, find the number of blue balls in the bag.

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Knowledge Check

  • A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball,determine the number of blue balls in the bag.

    A
    `10`
    B
    `5`
    C
    `15`
    D
    `20`

  • A bag contains 15 white balls and some black balls. If the probability of drawing a black ball is thrice that of a white ball, find the number of black balls in the bag.

    A
    `40`
    B
    `45`
    C
    `15`
    D
    `60`

  • A bag contains 5 white and 7 red balls. The probability of drawing a red ball is-

    A
    `5/12`
    B
    `7/12`
    C
    `5/7`
    D
    `7/5`

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